/*
 * Copyright 2008-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package es.alvsanand.webpage.services.security;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class CryptographyServiceImpl implements CryptographyService {
	private final static String DEFAULT_DIGEST_ALGORITHM = "SHA-512";

	private String digestAlgorithm;

	public String getDigestAlgorithm() {
		return digestAlgorithm;
	}

	public void setDigestAlgorithm(String digestAlgorithm) {
		this.digestAlgorithm = digestAlgorithm;
	}

	public byte[] digest(byte[] data) throws NoSuchAlgorithmException {
		MessageDigest md = MessageDigest.getInstance((digestAlgorithm != null) ? digestAlgorithm : DEFAULT_DIGEST_ALGORITHM);

		md.update(data);
		return md.digest();
	}

}
